I charged my iPhone 6s Plus 100% many times after purchasing...but in setting bar shows something else(usage time will be shown after battery is fully charged) what’s that mean??? I charged my iPhone fully 100% several times but it doesn’t show that my phone is fully charged... how can I fix that problem????

I charged my iPhone 6s Plus 100% many times after purchasing...but in setting bar shows something else(usage time will be shown after battery is fully charged) what’s that mean??? I charged my iPhone fully 100% several times but it doesn’t show that my phone is fully charged... how can I fix that problem????

You typically get that message after a reboot. In other words, after your device has been fully charged, you should be able to see the percentage of battery use your apps have been using. However, if you reboot your device, the usage stats will no display until it’s charged to 100% again. If it is still at 100% when you reboot, it may or may not display usage stats.